Latexfalt Joint Fill RX is a bitumen-rubber mix, formulated from a special bitumen, modified with a very flexible rubber, and filler materials.Latexfalt Joint Fill RX is suitable, in combination with a stone framework, for making flexible joints in the road surface, and for jointing strips between road surface and kerbing. Sealing is ensured by the very elastic Latexfalt RX, which remains flexible even at extremely low temperatures.